Message Driven PHP

MsgPHP is a project that aims to provide reusable domain layers for your application. It has a low development time overhead and avoids being overly opinionated.

It follows Semantic Versioning, yet during development phase a package can be marked @experimental to indicate "BC breaks" could be introduced.

Domain Layers

The domain layer is a collection of entity objects and related business logic that is designed to represent the enterprise business model. The major scope of this layer is to create a standardized and federated set of objects, that could be potentially reused within different projects. (source)

Currently supported domain layers are:

• Eav
• User
  • UserEav

On the roadmap are:

• Organization
• File
• Taxonomy
• ...

Design-Time Considerations

• The base domain package (msgphp/domain) integrates with YOUR domain layer (it's dependency free by design)
• You inherit from the default domain layers, if used
• The first-class supported ORM is Doctrine ORM
• The first-class supported message bus is Symfony Messenger

Message Based

Each domain layer provides a set of messages to consume it. Typically the messages are categorized into command-, event- and query-messages.

The main advantage is we can intuitively create an independent flow of business logic. It provides consistency in handling our business logic by dispatching the same message in e.g. web as well as CLI.

$anyMessageBus->dispatch(new CreateSomething(['field' => 'value']));

A command-message is dispatched and picked up by its handler to do the work. This handler on itself dispatches a new event-message (e.g. SomethingCreated) to notify the work is done.

A custom handler can subscribe to the SomethingCreated event to further finalize the business requirements (e.g. dispatch another commmand-message).

class MakeSomethingWork
{
    private $bus;

    public function __construct(YourFavoriteBus $bus)
    {
        $this->bus = $bus;
    }

    public function __invoke(SomethingCreated $event)
    {
        // do work, or better delegate work:
        $this->bus->dispatch(new LetSomethingWork($event->something));
    }
}

Documentation

• Read the main documentation
• Try the Symfony demo application
• Get support on Symfony's Slack #msgphp channel or raise an issue

Contributing

See CONTRIBUTING.md